Grinding, smoothing, roughening, and polishing machine.



. PATBNTED MAR.24,1903. R. OGHSGHIM.

, GRINDING, SMOOTHING, ROUGHENING, AND POLISHING MACHINE.

APPLICATION FILED 0013,1901.

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PATENTED MAR'.'24,' 1903.

R. OCHSCHIM. GRINDING, SMOOTHING, ROUGHENING, AND POLISHING MACHINE.

APPLICATION FILED OUT. 3, 1901.

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UNITED STATES PATENT FFICE.

RUDOLF OCHSCHIM, OF BERLIN, GERMANY.

GRINDING, SMOOTHING, ROUGHENING, AND POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 723,481, dated March 24, 1903.

Application filed October S, 1901. Serial No. 77,446. (No model.)

To aZZ whom, it may concern:

Be it known that I, RUDoLE OCHSOHIM, pianoforte-maker, a subject of the King of Prussia, German Emperor, residing at No. 47 Frankfurter Allee, Berlin, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvementsin Grinding, Smoothing, Roughening, and Polishing Machines, of which the following is a specification. I

This invention relates to the arrangement of a horizontally-acting machine the spindle of which may be automatically raised and may be automatically displaced or moved to and fro in a horizontal direction and upon the spindle of which is arranged a tool adapted to be adjusted longitudinally or axially during work and to be secured in place or fixed in position, if necessary, that the tool may be a grinding-tool, (so-called grinding-head,) if desired.

The main object of this machine is to grind massive or solid parts of wood or such covered with a thin veneer or veneers without destroying the pores of the wood or grinding it through, if it is a veneer, be it ever so thin, an indispensable requirement being that the tool which is automatically raised off the work-piece may be lowered down upon the same by the feel and may be adjusted in its position upon the spindle during work This machine maybe used, however, also for grinding and polishing or working upon other materials than wood.

In order to make my invention more clear, I refer to the accompanying drawings, in

I which similar letters denote similar parts throughout the several views, and in which- Figure 1 is a front view of the machine; Fig. 2, a plan of the lever arrangement for operating the slide carrying the working spindle; Fig. 8, a vertical section of the machine; Fig. 4, a plan of the means for actuating the working spindle. Figs. 5 and 5 are a front view and a side view, partly in section, of one of the slides for carrying and operating the working spindle.

Two slides a a, arranged one opposite to the other in the frame of the machine and adapted to be moved by levers g, having counterpoises z and being supported by movable rods 2', fulcrumed at 70, Figs. 1 to 3, and

stance, of parts jj 7' as shown.

priate means.

connected by a bar h, form at their lower ends bearings d, carrying the working spindle b, the middle part of which has a thread I). The bearing 01 of the slide a, has a rotary socket or box 6 with a hand-wheel c, and a feather located in said box takes into a groove provided in the spindle, so that this latter is rotated by the box if this is turned by the wheel 0, there being displaced by this movement a tool m-for instance, a so called grinding-head or the like-arranged upon the threaded portion of the spindle, provided the screw 02 be loosened.

'Below the working spindle and the tool is arranged a table y,which may be moved crosswise to the direction of the spindle. Said table is supported by rolls 11, upon rails 12 and is coupled to a threaded spindle it, having a hand-wheel w and taking into a nut 10*, secured to the table, so that this latter may be moved as well as fixed in position. There may be located inside the table a device or contrivance for displacing the work-piece w or 00 upon the table rectangularly to its other direction, such device consisting, for in- These parts are known and need not, therefore, be described.

The to-and-fro movement of the spindle b, with its tool, may be effected. by any appro- According to Figs. 1, 3, and 4 the spindle is connected to a rotary disk 0,

fixed upon one shaft with pulleys 8, one of which is fast upon said shaft. The connection is effected by a rod Z, attached at one end to a pin 13 of a collar 19, fixed to the spindle, and at the other end to a pin 0, fixed to said rotary disk. By these means or other. ones the spindle b is displaced lengthwise to and fro in the bearings 61, and at the same time it may be raised or lowered by means of the cross-bar h, the levers g, and the slides a a, to which said'bearings are attached, the counterpoises at said levers tending to raise the spindle automatically as soon as no pressure is exerted upon the bar it. Besides this, the work-piece itself may be displaced horizontally below the tool in two directions by aid of the means aforedescribed.

Having now described my invention, what I desire to secure by Letters Patent is In a machine for grinding,smoothin g,rou ghening, and polishing purposes especially for wooden-work pieces and veneers, the combination with two parallel slides mounted to move in vertical guides, of two levers connected pivotally at a distance from their ful crums with said two slides, yielding means for supporting the fulcrums of said levers, a

able pin with said crank-pin, so that during the revolution of said driving-shaft said spindle is put into a reciprocating longitudinal movement, an adjustable nut for the screwthreaded part of said spindle and adapted for receiving and holding the tool, means for shifting said nut with the tool by turning said spindle, a carriage for holding the work-piece and arranged to move beneath the tool in directions at right angles to said spindle, and means for shifting said carriage in either direction, substantially as set forth.

In Witness whereof I have hereunto set my hand in presence of two witnesses.

RUDOLF OOHSCHIM. Witnesses:

HENRY HASPER, WOLDEMAR HAUPT. 

